module RSpec::Mocks::TargetDelegationInstanceMethods

def define_matcher(matcher, name, &block)
  matcher.__send__(name, target, &block)
end

def matcher_allowed?(matcher)
  Matchers::Matcher === matcher
end

def raise_negation_unsupported(method_name, matcher)
  raise NegationUnsupportedError,
        "`#{expression}(...).#{method_name} #{matcher.name}` is not supported since it " \
        "doesn't really make sense. What would it even mean?"
end

def raise_unsupported_matcher(method_name, matcher)
  raise UnsupportedMatcherError,
        "only the `receive`, `have_received` and `receive_messages` matchers are supported " \
        "with `#{expression}(...).#{method_name}`, but you have provided: #{matcher}"
end